Rotary engine.



No. 706,485. Patented Aug. 5. I902.

' a. E. woonAnn,

ROTARY ENGINE;

(Application filed O ct. 24 1961. (No Model.) 3 Sheets-Sheet l.

No. 706,485. Patented Aug. 5, I902.

G. E. WOODARD.

ROTARY ENGINE.

(Application filed Oct, 24,, 1901.)

(No Model.) 3 Sheets-Sheet 2.

III'

I Sum/M01 witu aqaao 7 W7 attozwu lq U IT D STATES PATENT OFFIcE.

GEORGE E. WOODAR-D, OF BRADFORD,PENNSYLVANIA.

'orA RTY ENG m E.

SPECIFICATION forming part of Letters Patent No.'706,485, dated August5, 1902. Application filed October 24, :1901. Serial No. 79,845. (liemodel.)

T on whom, it may concern:

Be it known that I, GEORGE EIWOODARD, a

citizen of the United States, residing at Brad-j. ford, in the county ofMcKean and State of Pennsylvania, have invented certain new and usefulImprovements in Reversible Rotary Steam-Engines; and I do declare thefollow-v ing to be a full, clear, and exact description of theinvention, such as will enable othersskilled in the art to which itappertains to make and use the same. 7

The invention relates to reversible rotary steam-engines of theconcentricrimpact y The object of the invention is to provide an engineof this character which shall be simple of construction,durable in use,comparatively; inexpensive of production, and efficient in ac I tion.

With this and other objects in view themvention consists of certainnovel features of construction, combination, and arrangement of parts,which will be hereinafter more fully described, and particularly pointedout in the appended claim.

In the accompanying drawings, Figure 1 is a perspective view of myimproved rotary engine. Fig. 2 is a verticalsectionalview. Fig. 3 is asimilar view at right angles-to Fig.

2. Fig. 4 is a top plan View of the valve-casing. Fig. 5 is alongitudinal sectional view on line a- 00, and Fig. 6 is a longitudinalsectional view on line y y.

Referring to the drawings, 1 denotes the base of the engine; 2, thecylinder; 3, the

pillow-blocks, and 4 the shaft-bearin gs. The cylinder is provided atits ends with packingrecesses 6 and has secured to said ends the heads7, between which and the base-Wallsof.

therecesses are placed packing-strips 8. The heads7 are provided ontheir inner faces with cam-grooves 9.

10 denotes a piston mounted to rotate within the cylinder and fixed to ashaft 11,. j ournaled in the bearings 4:; 'This pistonis provided withan annular groove 12, intersected by radial slots 13, which open throughthe ends of the piston. Placed within these slots are wings 14, providedwith trunnions at their ends, which project through the ends of theslots and engage the cam-grooves of the cylinder-heads, whereby thewings are reciprocylinder.

cated within their recesses at proper intervals during the-rotation ofthe piston within the The valve-casing is provided with a steaminlet16andwith two ducts 18 and 19, leading therefrom into the interior of thecylinder at opposite points of a vertical line drawn through saidcylinder. The valve-casing is also provided with exhaust-ports 20 andalso with exhaust-ducts 21 and 22, which lead into the cylinder atopposite points of a vertical linedrawn therethrough.

23 denotes an abutment arranged on opposite sides of the ducts 19 and 22and 18 and 21.

24 denotes a valve-plug provided in its peripherywith recesses 25 and26, the former beingdesigned to control the admission of steam into thecylinder at either side of the abutment, so as to reverse the directionof rotation "of the piston, and the latter being designed to control theexhaust through the ducts 21 and 22, it being understood that when thepiston is rotating in the direction shown by the arrow in Fig. 2 thesteam is being'supplied through the duct 18 and the ex haust is takingplace through the duct 22 and when rotating in the opposite direction'the steam is supplied through the duct 19 and is exhausting through theduct 21.

iln'operation, steam being supplied to rotate the piston, as said pistonrotates the trunnions or studs projecting from the ends .of the wingsinto the cam-grooves in the cylinder-head will reciprocate said wings,so that as the Wings reach the abutment they will be withdrawn intotheir slots, so as to permit of their passing the abutment, and afterpassing the abutment they will be projected d in the scope of theinvention without departing from the spirit or sacrificing any of theadvantages thereof.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is- V In a rotary steam-engine, the combination witha cylinder provided with grooves in its having two ducts leadingtherefrom into the cylinder-at opposite points of a vertical line drawnthrough said cylinder, said casing being also provided withexhaust-ports and with exhaust-ducts which lead into the cylinder atopposite points of a vertical line drawn therethrough, a valve-plugprovided with two recesses in its periphery, one being designed tocontrol the admission of steam into the cylinder at either side of theabutment-head, so as to reverse the direction of rotation of the piston,and the other designed to control the exhaust through the exhaustducts,a rotary piston having an annular groove intersected by slots open attheir ends, wings located in said slots and having studs or trunnionsprojecting through the open ends of the slots and through the grooves inthe heads of the cylinder, whereby as they approach the abutment-head,the wings will be drawn into said slots to permit of said wings freelypassing under the abutmenthead, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

GEORGE E. WOODARD.

Witnesses:

MARY WOODWARD, L. F. EGBERT.

